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-   -   RS775 Gearboxes (http://www.chiefdelphi.com/forums/showthread.php?t=89325)

JesseK 28-01-2011 11:12

Re: RS775 Gearboxes
 
Quote:

Originally Posted by JamesCH95 (Post 1010383)
You'd have to knurl the 550 shaft to press on the FP pinion I think.

I don't know why you'd want to do that given that the 2011 FP motor has a higher free speed and higher torque that the 550 and already has the pinion pressed onto it... :confused:

Edit: If memory serves the RS775 shaft would be big enough to drill out the FP pinion and use the RS775 in the FP gearbox, though drilling new mounting holes would be a PITB. Food for thought.

The short story is, while I agree that the FP motor is powerful enough to power our lift system, our experience is (in effect) urging us to add another motor to it in order to balance the load (whereas we can only legally have 1 FP). We have terrible [luck?] experience in properly determining the motor loads. We'd really like to use 2 BB775's since they require less to gear down to our target 300 RPM, yet the BB550's already mate nicely with the AndyMark FP Planetary Gearboxes and (theoretically) require less machining (of which we have limited capabilities). We want to put either setup through an AM Toughbox due to cost (we already have it) and ease of mounting an encoder.

*goes of to look up knurling*

JamesCH95 28-01-2011 11:23

Re: RS775 Gearboxes
 
Quote:

Originally Posted by JesseK (Post 1010394)
The short story is, while I agree that the FP motor is powerful enough to power our lift system, our experience is (in effect) urging us to add another motor to it in order to balance the load (whereas we can only legally have 1 FP). We have terrible [luck?] experience in properly determining the motor loads. We'd really like to use 2 BB775's since they require less to gear down to our target 300 RPM, yet the BB550's already mate nicely with the AndyMark FP Planetary Gearboxes and (theoretically) require less machining (of which we have limited capabilities). We want to put either setup through an AM Toughbox due to cost (we already have it) and ease of mounting an encoder.

*goes of to look up knurling*

FWIW this is our plan right now, to use a DeWalt-mounted RS775 in combination with a P60 mounted RS775, with appropriate sprocket reductions to closely match speeds.

I would not hesitate to gang a 775+ dewalt with a FP+KoP transmission. I would also consider two 550s or 1 550 and 1 FP into a single DeWalt the same way AndyA and I did way back in 2005. It wound up with an approximately 400:1 reduction.


Alan Anderson 28-01-2011 11:31

Re: RS775 Gearboxes
 
Quote:

Originally Posted by AcesJames (Post 1009764)
We placed our order on the morning of the 14th I believe. That would be 10 business days ago.

January 17 didn't count as a business day for many businesses.

Vikesrock 29-01-2011 00:28

Re: RS775 Gearboxes
 
Quote:

Originally Posted by AdamHeard (Post 1010233)
the 550's through KOP FP gearboxes would be good!

I've found a few mentions on various forums of the 775s also fitting in these FP gearboxes. You need to find a 32DP pinion that matches the number of teeth of the pinion on this year's FP, Tower Hobbies is supposedly one potential source.

Tom Line 29-01-2011 16:51

Re: RS775 Gearboxes
 
Well, we went and made the decision today. We've always been iffy on banebots - actually we haven't bought anything from then since the '07 debacle. We ordered our P-60 transmissions for our arm 10 business days ago, back when the "wait" period was supposed 3-5 days to ship. They have still not shipped.

An email to banebots Friday morning regarding order status went unanswered. I made 14 calls Friday during the day, and not one time did they answer the phone (no, I didn't leave a message).

Today we made the decision - we had a number of unmodified dewalts sitting on the shelf that are still legal, so we ordered the additional components, clamshells etc, and picked air freight. Dewalt says we'll have them by Tuesday.

If and when our banebots ever arrive we'll be RMA'ing them or selling them to another team who wants them.

Swampdude 01-02-2011 16:49

Re: RS775 Gearboxes
 
I'm told we received an email today from BaneBots that our (2) P60 256:1 gearboxes will ship tomorrow.

Travis Hoffman 01-02-2011 18:20

Re: RS775 Gearboxes
 
Quote:

Originally Posted by Swampdude (Post 1013519)
I'm told we received an email today from BaneBots that our (2) P60 256:1 gearboxes will ship tomorrow.

For reference, when did you order them?

AcesJames 01-02-2011 18:26

Re: RS775 Gearboxes
 
My team received an email from BB yesterday that our P60s had finally shipped, and should be at our shop by this Friday.

For reference, they were ordered on 1/17.

It seems that teams who ordered them early be receiving emails this week that their orders have shipped.

Swampdude 01-02-2011 21:53

Re: RS775 Gearboxes
 
Quote:

Originally Posted by Travis Hoffman (Post 1013603)
For reference, when did you order them?

1/19

Vince 02-02-2011 10:19

Re: RS775 Gearboxes
 
Did anyone try to find some original applications of these motors and use the gearboxes directly?
775 used in a drill

If indeed we find "applications" of these motors (as well as the rest of the Bane-Bots motors) embedded in products, perhaps that is the ticket to getting a motor/transmission that can be be immediately acquired and used?

Another commercial items that uses "BaneBots motors":
RS-550 used in a drill

pfreivald 02-02-2011 10:25

Re: RS775 Gearboxes
 
I think as an off-season project we will work on different interfaces for Banebots motors, so that we never, ever, ever have to rely on them for planetary gearboxes ever again...

thefro526 02-02-2011 15:14

Re: RS775 Gearboxes
 
Good News, we received an E-Mail telling us that our order of 775 Series P60 Gearboxes are shipping today. For reference our order was placed on the morning of the 19th.

JamesCH95 02-02-2011 15:16

Re: RS775 Gearboxes
 
^Same with us, placed on the 19th, got the confirmation after lunch today. Finally...

AdamHeard 02-02-2011 19:22

Re: RS775 Gearboxes
 
Quote:

Originally Posted by pfreivald (Post 1014022)
I think as an off-season project we will work on different interfaces for Banebots motors, so that we never, ever, ever have to rely on them for planetary gearboxes ever again...

This problem is pretty much "solved" already.

For low/no resource teams, a 550 is a drop in for the KOP FP gearbox.

For low resource teams, the 550 and 775 fit up to an AM planetary.

For any team, a custom spur gearbox could be easily made. The pinions are easily available at sdp-si, or just about ANY hobby shop (yes, they will carry a huge range of 3.2mm and 5mm bore 32DP pinions).

On that note, many RC car gearboxes would work, and be durable enough to run these motors; considering 550 and 775 motors are commonplace on them.

craigboez 03-02-2011 02:42

Re: RS775 Gearboxes
 
We are anxiously awaiting an email stating that our gearboxes have shipped. We're planning on machining our own custom output shafts and really need to know the exact dimensions of the shafts. I can't seem to find a detailed drawing anywhere. If anyone has already received their P60-775 and would be kind enough to give some details on it, they would be much appreciated.


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